Bump org.springframework.boot from 3.5.7 to 4.0.2 by rashidi · Pull Request #325 · rashidi/spring-boot-tutorials

rashidi · 2026-01-26T10:49:16Z

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gemini-code-assist · 2026-01-26T10:50:40Z

Summary of Changes

Hello @rashidi, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request performs a significant dependency upgrade, moving the project to Spring Boot 4.0.2. This upgrade necessitated updates to various Spring Boot starters, Testcontainers libraries, and other core dependencies. A key change is the removal of the test-rest-assured module, streamlining the project's testing examples. The changes ensure compatibility with the latest Spring Boot ecosystem and incorporate new testing utilities.

Highlights

Spring Boot Version Upgrade: The project has been upgraded to Spring Boot version 4.0.2 across all modules, reflecting the latest features and improvements.
Dependency Updates and Refactoring: Numerous dependencies have been updated, including Testcontainers (to testcontainers-junit-jupiter and specific module variants), Jackson (tools.jackson.core), Spring Batch (new package structure org.springframework.batch.infrastructure.item), and Spring Web starters (spring-boot-starter-webmvc). New test-specific starters like spring-boot-resttestclient, spring-boot-starter-data-jpa-test, and spring-boot-starter-webmvc-test have been introduced.
Removal of 'test-rest-assured' Module: The entire test-rest-assured module, including its source code, tests, documentation, and build configuration, has been removed from the project. This suggests a consolidation or deprecation of its approach.
Configuration and Code Adjustments: Configuration files like bootstrap.yml have been merged into application.yml in cloud-jdbc-env-repo. Java import statements and code snippets (e.g., lambda parameters, @GeneratedValue annotation) have been adjusted to align with the new dependency versions and package structures.

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github-actions · 2026-01-26T10:51:07Z

Job Summary for Gradle

Gradle Build :: gradle-build

Gradle Root Project	Requested Tasks	Gradle Version	Build Outcome	Build Scan®
spring-boot-tutorials	check	9.3.0	❌

github-actions · 2026-01-26T10:53:45Z

Job Summary for Gradle

Gradle Build :: gradle-build

Gradle Root Project	Requested Tasks	Gradle Version	Build Outcome	Build Scan®
spring-boot-tutorials	check	9.3.0	❌

gemini-code-assist

Code Review

This pull request primarily focuses on upgrading Spring Boot to version 4.0.2, which necessitated numerous dependency updates, package renames, and the introduction of new starter dependencies across various modules. Key changes include updating Testcontainers, Jackson, and Spring Batch related packages, as well as migrating configuration in cloud-jdbc-env-repo from bootstrap.yml to application.yml. Additionally, the test-rest-assured module has been entirely removed. While most changes are straightforward dependency and package updates, there's a notable change in Author.java where @GeneratedValue was removed from an embedded ID, which could have functional implications. Overall, the changes reflect a necessary upgrade path, but attention should be paid to the ID generation behavior.

gemini-code-assist · 2026-01-26T10:53:50Z

data-rest-composite-id/src/main/java/zin/rashidi/datarest/compositeid/book/Author.java

    static class Id implements Serializable {

-        @GeneratedValue
        private Long id;


The @GeneratedValue annotation was removed from the id field within the Id embeddable class. If this ID was previously intended to be automatically generated by the persistence provider (e.g., database sequence or identity column), its removal means the ID will no longer be generated. This could lead to null IDs or other data integrity issues if the application logic does not explicitly assign a value to this ID before persistence. Please confirm if this change is intentional and if there's an alternative mechanism for ID generation or assignment in place.

gemini-code-assist · 2026-01-26T10:53:50Z

batch-skip-step/src/test/java/zin/rashidi/boot/batch/user/UserBatchJobTests.java

@@ -68,7 +69,7 @@ void findAll() {
            assertThat(execution.getExitStatus()).isEqualTo(COMPLETED);
        });



Changing the lambda parameter from _ to i is a good practice for clarity, even if the parameter is not directly used within the lambda body. It improves readability by explicitly naming the parameter, which can be helpful for future maintainers understanding the lambda's signature.

var users = jdbc.query("SELECT * FROM users", (rs, i) ->

gemini-code-assist · 2026-01-26T10:53:50Z

cloud-jdbc-env-repo/src/main/resources/application.yml

+app.greet.name: Default
+spring:
+  application.name: demo
+  cloud.config.server:
+    bootstrap: true
+    jdbc:
+      sql: SELECT `KEY`, `VALUE` from PROPERTIES where APPLICATION=? and PROFILE=? and LABEL=?
+      sql-without-profile: SELECT `KEY`, `VALUE` from PROPERTIES where APPLICATION=? and PROFILE='default' and LABEL=?
+  profiles.active: jdbc


The migration of configuration from bootstrap.yml to application.yml and the change in YAML structure from nested to flat for app.greet.name is a significant refactoring. While bootstrap.yml is deprecated in newer Spring Boot versions, ensuring all configurations are correctly translated and behave as expected is crucial. The flat property app.greet.name is a more concise way to define simple properties.

github-actions · 2026-01-26T11:00:00Z

Job Summary for Gradle

Gradle Build :: gradle-build

Gradle Root Project	Requested Tasks	Gradle Version	Build Outcome	Build Scan®
spring-boot-tutorials	check	9.3.0	❌

github-actions · 2026-01-27T10:17:17Z

Job Summary for Gradle

Gradle Build :: gradle-build

Gradle Root Project	Requested Tasks	Gradle Version	Build Outcome	Build Scan®
spring-boot-tutorials	check	9.3.0	❌

github-actions · 2026-01-27T10:26:04Z

Job Summary for Gradle

Gradle Build :: gradle-build

Gradle Root Project	Requested Tasks	Gradle Version	Build Outcome	Build Scan®
spring-boot-tutorials	check	9.3.0	❌

Bump spring boot to version 4.0.2

6f967af

rashidi added dependencies Pull requests that update a dependency file java Pull requests that update Java code labels Jan 26, 2026

Bump spring boot to version 4.0.2

0310021

rashidi mentioned this pull request Jan 26, 2026

Bump org.springframework.boot from 3.5.7 to 4.0.2 #321

Closed

rashidi changed the title ~~Bump Spring Boot to version 4.0.2~~ Bump org.springframework.boot from 3.5.7 to 4.0.2 Jan 26, 2026

gemini-code-assist bot reviewed Jan 26, 2026

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Bump spring boot to version 4.0.2

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Bump org.springframework.boot from 3.5.7 to 4.0.2#325

Bump org.springframework.boot from 3.5.7 to 4.0.2#325
rashidi wants to merge 5 commits intomasterfrom
spring-boot/upgrade-4.0.2

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		@@ -68,7 +69,7 @@ void findAll() {
		assertThat(execution.getExitStatus()).isEqualTo(COMPLETED);
		});

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